Perturbed Angular Correlation Studies in SrTi03 Single Crystals

Perturbed Angular Correlation Studies in the Ferromagnetic Rare

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN-PPE / 95-137 31.08.1995 ION BEAM CHANNELING AND HYPERFINE INTERACTION ANALYSIS FOR THE CHARACTERIZATION OF STOICHIOMETRY AND ANTI-SITE POPULATION IN LiNbO3

Combined high precision RBS/channeling, NRA/channeling and perturbed angular studies were used to characterize near-stoichiometric and congruent LiNbO3 single crystals. In congruent LiNbO3 two non-equivalent Li sites are distinguished whereas in near-stoichiometric LiNbO3 only one of them exists. A comparison of the experimental results with Monte Carlo simulations was performed to check the va...

DX-centers in CdTe and ZnTe observed by locally sensitive probe atoms

Heavily In-doped CdTe and ZnTe crystals are investigated using perturbed γγ-angular correlation experiments. By means of characteristic electric field gradients, it is shown that in the Cd (Zn) poor regime, the compensation is governed by A-center formation. After annealing in Cd (Zn) rich atmosphere, the formation of DX-centers is observed and identified as the prevailing compensation mechanis...

Study of carbonic anhydrase using perturbed angular correlations of gamma radiation.

The angular correlation of the 150-247 kev gamma-ray cascade of (111m)Cd is strongly perturbed when this nucleus is bound to the enzyme carbonic anhydrase. A comparison of the perturbed angular correlation for the apoenzyme with that for native carbonic anhydrase confirms that the (111m)Cd binds at the active region of the enzyme. These results provide good evidence that the perturbed angular c...

Perturbed angular correlation study of a haptenic molecule.

The angular correlation of the 173-247 keV gamma-ray cascade after the electron-capture decay of (111)In is strongly perturbed when the 1-p-nitrophenyl-ethylenediaminetetraacetate chelate of (111)In(8+) is added to a solution containing rabbit antibody to dinitrophenyl groups. The radioactive chelate can be displaced by the addition of dinitrophenyllysine or unlabeled chelate. The average assoc...